`1.` You mustn't chat in the examination.

`-` S + mustn't + V(bare): Ai đó không được làm gì

`2.` The students don't do as many assignments as they did last year.

`-` So sánh bằng: S1 + tobe/ V + as + adj/ adv + as + S2

`3.` George used to be more considerate than he is now.

`-` So sánh hơn: S1 + tobe/ V + adj/ adv + -er `/` more + adj/ adv + than + S2

`4.` There were too many questions on the test that I couldn't finish them in half an hour.

`-` S + V + too many + N đếm được số nhiều + that + S + V

`5.` She was not tall enough to reach the top of the high shelves.

`-` S + tobe/ V + not + adj/ adv + enough + to V: không đủ ... để làm gì